4th session

SSH port

(a)  

http port

(a)  

https port

(a)  

is responsible for routing, addressing, and delivering data packets across networks.

• Physical layer

• network layer

• session layer

• presentation layer

receives the data from the application layer and translates it into a format and syntax that's readable by other computers

• network layer

• presentation layer

• application layer

• datalink layer

In data link layer and responsible for checksum error and error control

• Media Access Control

• Logical link control